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Am 09.10.2017 um 13:39 schrieb Bald Eagle:
>> is it possible to create a scene where the rendered items are visible
>> but the entire empty background becomes transparent, if the output image
>> is a PNG?
>
> Of course. This question has been asked loads of times, probably even by
> myself.
>
> TdG recommends:
> background { colour srgbt <0.0, 0.0, 0.0, 1.0> }
That.
> Warp recommends activating alpha in the command line (+ua), and using no
> background whatsoever:
Those posts date back to the days of v3.6. The handling of transparency
has been overhauled since then, so don't expect that advice to work in v3.7.
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